Retarding device



Nov. 3, 1925.

A. D. TRENOR RETARDING DEVICE Original Filed Nov. 1, 1917 QLIfl ENTOR01%; KO 14? atented ova 332$.

ALBERT D. TEENGR, 0F

NEW YORK, N. '21, ASSIGHOE TO JOHN HAYS HAMMOND, JB.,

0!? GLOUCETEE, SACHUSETTS ammonia Device.

Application filed Rhvember 1, 1917, Serial To all whom it may concern:

Be it known that I, Annnn'r D. TRENOR, a citizen of the United States,and a resident of the city of New York, in the count of New York andState of New York, ave invented certain new and useiul Improvements inRetarding Devices, of which the following is a specification.

Some of the objects of this invention are to provide an improvedretarding device Where by an impulse of fluid under pressure whencontinued for a predetermined period of time will cause theoperation ofa valve to permit a fluid to pass through a pipe and to continue to passthrough the pipe for a predetermined period after the impulse ofcompressed fluid has been terminated; and to provide other improvementsas will hereinafter appear.

The accompanying drawin is a longitudinal central section of a denyingdevice constructed in accordance with this invention. Referring to thedrawing, one embodiment of this invention comprises a valve including astationary cylindrical valve casing 11 which is provided with twodiametrically opposed ports, an inlet port 12 and an outlet port'13, andwith an exhaust port 1% arranged in longitudinal alinement with theoutlet port- 13'. Extending axially through. the casing 11 is avalve-stem 15 and loosely surrounding the valve-stem 15 and fitting;snugly but slidably in the valve casing 11 is piston valve 16 which ispro vided adiacent one end with an annular re ccss 17, adjacent itsother end with a longitudinally extending recess 18 which is arranged tocommunicate with the corresponding port 13 when the valve 16 is in itsinnermost position as shown in the drawing. The valve 16 is held againstrotation with respect to the valve casing 11 in any suitable manner, asfor instance by means of a rectangular lug or key 19 projecting inwardlymom and rigidly secured to the casing ii and engaging snugly outslidahly in a he way 20 provided therefor in the valve 16 andextending-longitudinally there-- of. 1 d upor the valve-stein 15 andarr-am o sides of the valve i sleeves Z 28 pro ta o caps are arranged tothe delaying cylinder No. 193,7 2? Renewed February 28, 1923.

and which are threaded into the opposite ends respectively of the valvecasing 11. Between the inner ends of the two caps 29 and 30 andcorresponding annular internal shoulders 31 and 32 provided therefor inthe valve casing 11 are two packing rings 33 and 34.

Spaced from the valve-casing 11 and arranged coaxially ing cylinder 35through which the valvestem 15 extends snugly but slidably. Surroundingand rigidly secured to the valvestem 15 is a delaying piston 36 whichfits snugly but slidably in the delaying cylinder 35. The delayingcylinder 35 is provided at each end with two ports 37, 38. The two ports37, 38 of one end of the cylinder communicate respectively through twopipes 39 and with the corresponding ports 37 and 38 of the other end ofthe cylinder. These two pipes 39 and 40 are controlled at one end of thecylinder 35 lo an outwardly closingcheck-valve and y a needle valve 46respectively, and at the other endof the cylinder 35 these two pipes 39and 10 are controlled by a needle valve i? and by an outwardly closingcheckvalve 48 respectively. Spaced outside of 35 and surrounding andrigid with the valve-stem 15 is, collar 50, and surrounding thevalve-stem 15 between the collar 50 and the corresponding end of thedelaying cylinder 35 is a normally compressed spiral spring 51 whichnormally acts to hold the valve-stem 15 in such a position that thevalve 16 carried thereby will he in the position shown in the drawing inwhich the inlet port 12 will be closed and the outlet port 13 will be incommunication through the recess 18 with the exhaust port 14.

For moving the valve-stem 15 inwardly to ultimately move the valve 16into sue a position that the inlet port 12 will be in communication withthe outlet port 13 through the annular recess 17 of the valve iii, anactuating cylinder 55 is spaced bend the o1 ter end of the valve-stem 15and position coaxial therewith manner. This actuating 'ovided at itsouter end with h w compressed air or i may he admitted or may he exngatmosphere.

therewith is a fixed delay- Snugly but slidablyarranged in the actuatingcylinder 55 is an actuating piston-60 which is rigidly secured to theinner end of a piston rod 61 which is arranged to reciprocate throughthe inner end of the cylinder 55. The outer end of this piston rod 61 isenlarged as at 62 and is provided with a cylindrical recess or socket 63arranged to slidably receive the corresponding end of the valve-stem andto permit the outer end of the enlarged portion 62 of the piston rod 61to engage against the outer annular surface of the collar which is rigidwith the valve-stem 15. The actuating piston 60 is normally held in itsinnermost position by means of a normally action of the retarding piston36.

compressed spiral spring 65 arranged within the actuating piston andsurrounding the piston rod 61. In the operation of this improveddelaying device, the parts are normally arranged as shown in thedrawing, and when an impulse of com ressed air is permitted to passinwardly t rough the port 56 of the actuating cylinder 55, .the pistonwill be gradually moved outwardly towards the valve casing against theaction of the normally compressed spiral spring and against the actionof the spiral spring 51 which surrounds the valvestem' 15, and alsoagainst the retarding If this impulse of compressed air is continuedinwardly through the port 56 for a predetermined period, which may bevaried by varying the pressure of the air or by varying the adjustmentof the needle valve 46, the sleeve 26 carried by the stem 15 will bebrou ht into engagement with the correspon ing end of the piston valve16, and

if the impulse of compressed air is further continued for a sufficientpredetermined period the piston valve 16 will be moved into itsoutermost or operative position in which the piston valve will bearranged so that its annular recess 17 is in alinement with and permitscommunication between v the inlet port 12 and the outlet port 13.

If now after the piston valve 16 has been moved into its outermostposition as just described, the impulse of compressed air inwardlythrough the port 56 is discontinued and the air is permitted to passoutwardly from the actuating cylinder 55 through the port 56, the piston60 together with the piston rod 61 will be immediately returned to theirinitial position under the action of the spring 65 and the valve-stem 15wiii be permitted to be returned towards the norniai position under theaction of the spirai spring by the retarding piston And after thevalve-stem 15 has been mus moved through a pretermined distance orperiod towards its initial position, the time of which c: be regulatedby the needle vaive 4?, i -eve 25 Wiii he in'ouglzt into ti -,6 Si

engagement With the outer end of the piston-valve 16, whereupon acontinuous movement of the valve-stem 15 for a predetermined period willreturn the piston-valve 16 into its initial position as shown, in whichcommunication will be closed between the inlet port 12 and the outletport 13, and the latter will be opened to the exhaust port 14 throughthe recess 18, as shown in the drawing.

Although only a single form has been shown in which this invention maybe embodied, it is to be understood that the invention is not limited inits application to any particular construction but might be embodied invarious forms without departing from the spirit of the invention or thescope of the appended claims.

Having thus fully described this invention, I claim: 1

l. A control mechanism comprising a fixed valve casing provided with aninlet port and with "an outlet port, a. valve ar-' ranged to reciprocatein said casing to control said ports, a valve stem having a lost motionconnection with said valve, meansineluding a. fluid actuated device.having a lost motion connection with said valve stem for moving saidvalve stem in one direction, and means to retard the movement of saidvalve stem in either direction.

2. A control mechanism comprising a fixed valve casing provided with aninlet port and with an outlet port, a valve arranged to reciprocate insaid casing to control said ports, a valve stem having a lost motionconnection with said valve, means including a fluid actuated devicehaving a lost motion con iection with said valve stem for moving saidvalve stem in one direction, and retarding means variable at will tocontrol the movement of said valve stem in either dimotion.

3. A control mechanism com rising a valve casing provided with an inletport and with an outlet port, a. valve arranged to reciprocate in suchcasing to control said ports, a valve stem having a lost motionconnection with said valve for reciprocating said valve and meansincluding a fluid actuated device having a lost motion con nection withsaid valve stem for moving said valve stem in one direction.

4. A control mechanism comprising a fixed valve casing provided with aninlet port and with an outlet port, valve arranged to reciprocate insaidcasing to control said ports, a valve stem having a lost motionconnection with said valve for reciprocating said valve, and meansincluding a cylinder and a piston siidable in said cylinder, said pistonhaving a lost motionconnection with said valve stem for moving saidvalve stem in one direction.

5. A control mechanism comprising a iii) valve casing provided with aninlet port and with an outlet" port, a valve movable in said casing tocontrol said ports, means having a lost, motion connection with saidvalve for actuatin said valve ineither of two directions, an meansincluding a fluid actuated device having a lost motion connection withsaid first mentioned means for moving said first mentioned means in oneof said directions.

6. A control mechanism comprising a valve casing provided with an inletport and with an outlet port, a valve arranged to reciprocate in saidcasing for controlling said ports, a. reciprocatory valve stem having alost motion connection with said valve for reciprocating said valve andmeans including a fluid actuated device having a lost motion connectionwith said valve stem for moving said valve stem in one direction.

7. A a control mechanism comprising a valve casing provided with aninlet port and an outlet port, a valve cooperating with both of saidports and arranged to reciprocate in said casing to control said ports,a reciprocatory valve stem having a lost motion connection with saidvalve for reciprocating same, means whereby said valve stem may be movedin one direction said means having a lost motion connection with saidvalve stem, and means fixed upon said valve stem for retarding themovement of the same.

8. A control mechanism comprising a valve casing provided with an inletport and an outlet port, a valve cooperating with both of said ports andarranged to reciprocate in said casing to control said ports, areciprocatory valve stem having a lost motion connection with said valvefor reciprocating same, means whereby said valve stem may be moved inone direction said means having a lost motion connection with said valvestem, and means fixed upon said valve stem for retarding the movement ofthe same in either direction 9. A control mechanism comprising a valvecasing, provided with an inlet port, an outlet port, and an exhaustport, a valve arranged to reciprocate in said casing to control saidports, said valve being so constructed that when it is in one positionit will cause said inlet port to communicate with said outlet port andso that when in another position it will prevent comn'iunication betweensaid inlet port and said outlet port and will cause said outlet port tocom municate with said exhaust port, and means to retard the movement ofsaid valve in either direction.

10. A control mechanism comprising a. valve casing, provided with aninlet port, an outlet port and an exhaust port, and a valve arranged toreciprocate in said casing to control said ports, said valve being soconstructed that when it is in one position it will cause said inletport to communicate with said outlet port and so that when in anotherposition it will prevent communication between said inlet port and saidoutlet port and will cause said outlet port to communicate with saidexhaust port, a valve stem having a lost motion connection with saidvalve for reciprocating said valve,means having a lost motion connectionwith said valve stem for moving said valve stem in one direction, andmeans to retard the movement of said valve stem in either direction.

11. A control mechanism comprising a valve casing provided with an inletport, an outlet port, and an exhaust port, a valve arrangedtoieciprocatein said casing to control said ports, said valve being provided withpassages whereby when said valve is in one position said inlet port willbe in communication with said outlet port, and there will be nocommunication through said valve between said exhaust port and saidoutlet port, or said inlet port, but when said valve is in anotherposition communication will be closed between said inlet port and saidoutlet port but will be established through said valve between saidoutlet port and said exhaust port, a valve stem extending looselythrough said valve, two stops arranged upon said valve stem upon 0posite sides respectively of said valve an an ranged to permit of alimited longitudinal movement of said valve stem with respect tosaid'valve, means having limited movement with respect to said valvestem for moving said valve stem in one direction, and means to retardthe movement of said valve stem in either direction.

12. A control mechanism comprising a valve casing provided with an inletport, an outlet port and an exhaust port, a valve arranged toreciprocate in said casing to control said ports, said valve beingprovided with passages whereby when said valve is in one position saidinlet port will be in communication with said outlet port, and therewill be no communication through said valve between said exhaust portand said outlet port, or said inlet r'port, but when said valve is inanother position communication will be closed between said inlet )ortand said'outlet ort but will he established through said va ve betweensaid outlet port and said exhaust ort, a valve stem extending looselythroug said valve, two stops arranged upon said valve stem upon op msitesides respectively of said valve and arranged to permit of a limitedlongitudinal moven'ient of said valve stem with respect to said valve,means including an element carried by said valve stem for retarding themovement of said valve stem, and means having limited movement withrespect to said valve stem for moving said valve stem in one direction,and yielding means operatively connected with said valve stems formoving the same in an opposite direction.

13. A control mechanism comprising a valve casing, a valve arranged torecipro cate in said casing a valve stem extending loose] through saidvalve, -two stops carried y said stem upon opposite sides of said valverespectively and arranged to permit of a limited longitudinal movementof said stem with respect to said valve, a piston carried by said stem,a fixed cylinder through which said stem is arranged to reciprocate, apair of pipes providing communication between the opposite ends of saidcylinder, said pipes being provided with suitable valves, some of whichare adjustable so as to cause the retardation of said piston in eitherdirection, means operative 1y connected to said stem and having alimited movement with respect thereto for moving said stem in onedirection, and yielding means operatively connected to said stem formoving the same in an opposite direction.

14. A control mechanism comprising a valve casing, a valve arranged toreciprocate in said casing, a valve stem having a lost motion connectionwith said valve for reciprocating the same, power means for moving saidvalve stem in one direction said means having a lost motion connectionwith said stem, yielding means for moving said stem in an oppositedirection and means for retarding the movement of said stem in saidopposite direction.

Signed at New York, i' the county of New York and State of New Yorkthis.

29th day of October A D. 1917.

ALBERT D. TRENOR.

